What Motivates People To Change?

... This is the question!
In my opinion, people change in two situations:

• when they want it - ambition, desire for improvement, need to be better, may be some reasons to try to change.
• when they are forced to do so - a failure in business (or in love?), a wrong step in life, a new job, may have the same effect.

I think it's important to be a positive change, even if it's difficult and perhaps risky.
In life, man needs the courage to look in the mirror and decide when to change himself.

Now I'm waiting for your answers to this question:  WHAT MOTIVATES PEOPLE TO CHANGE?